A multichannel RF switching device of an embodiment has a connector in which all or some of a plurality of terminals are configured to be connected to a plurality of coil elements, a matrix switch having a plurality of input ports arranged in a line and a plurality of output ports arranged in a line, and a wiring portion connecting the respective terminals configured to be connected to the plural coil elements with a plurality of input ports in use included in the plural input ports one-on-one, the input ports in use amounting to fewer than the total number of the input ports, wherein the wiring portion connects the respective terminals with the input ports in use one-on-one in such a way that a separation between adjacent two of all or some of the input ports in use is larger than a separation between adjacent two of the input ports.
